Finding the Fourth Proportional to 309,484.12, 464,250.88 and 131,992.72

Step by Step Solution

1. Step 1: Write the proportion equation
   309,484.12 : 464,250.88 = 131,992.72 : x
2. Step 2: Convert to fraction form
   309,484.12/464,250.88 = 131,992.72/x
3. Step 3: Cross multiply
   309,484.12x = 464,250.88 × 131,992.72
4. Step 4: Simplify right side
   309,484.12x = 61,277,736,413.59
5. Step 5: Solve for x
   x = 61,277,736,413.59/309,484.12
6. Step 6: Final answer
   x = 197,999.61